BIRM is used to remove dissolved iron and manganese.
Installed in tanks with Backwash Only valve heads.
When does it need to be changed?
The flow rate through the tank has significantly reduced
There is more "IRON" coming out of the tank then going into it.
The pH must be above 6.8 and dissolved oxygen content must be equal to 15% of the iron and manganese content. No regeneration is required, only periodic backwashing
ALSO 9" x 48" tanks = 1.0 cu.ft. plus gravel ( 13 lbs. )
INSTRUCTIONS - Replacing MEDIA ( Carbon, Greensand, Birm, Calcite, etc ),
see: Other MEDIA replacement GUIDE
10" x 54" tanks = 1.5 cu.ft. plus gravel. ( 16 lbs. )
12" x 52" tanks = 2.0 cu.ft. plus gravel ( 20 lbs. )